The chemistry of p-block metallacarboranes of the C 2 B i o systems is largely unexplored in comparison with that of s-, d-, and f-block metallacarboranes. This article reports several carbons-adjacent stannacarboranes of the C 2 B 1 0 system and their chemical properties for the first time. Reaction ofSnCl 2 with [{μ-1,2-[o-C 6 H 4 -(CH 2 ) 2 ]-1,2-C 2 B 1 0 H 1 0 } 2 Na 4 (THF)6/n gave the Lewis base free stannacarborane {μ-1,2-[o-C 6 H 4 (CH) 2 ]-1,2-C 2 B 1 0 H 1 0 }-Sn (1). Recrystallization of 1 from MeCN, THF, and DME afforded the corresponding Lewis base coordinated stannacarboranes {μ-1,2- [o-C 6 H 4 4 (CH 2 ) 2 ]-1,2-C 2 B 1 0 H 1 0 }-Sn MeCN) (2), {μ-1,2-[o-C 6 H 4 (CH 2 ) 2 ]-1,2-C 2 B 1 0 H 1 0 }Sn -(THF).THF (3-THF), and {μ-1,2-[o-C 6 H 4 (CH 2 ) 2 ]-1,2-C 2 B 1 0 H 1 0 }Sn(DME) (4), respectively. They were fully characterized by various spectroscopic data and elemental analyses. Complexes 2-4 were further confirmed by single-crystal X-ray analyses.